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Gabriel Grey
Gabriel Grey, ASE Certified Technician
Category: Mercedes
Satisfied Customers: 902
Experience:  ASE Certified Master Technician
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Panoramic Sunroof will not full close. Will open Peter Evans

Customer Question

Panoramic Sunroof will not full close
JA: What is the model/year of your Mercedes?
Customer: will open Peter Evans GLA 200
JA: What year is your Mercedes?
Customer: 2014
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: yes open and close
JA: Anything else you want the Mechanic to know before I connect you?
Customer: no
Submitted: 16 days ago.
Category: Mercedes
Expert:  Gabriel Grey replied 16 days ago.

Good day, I hope you are doing well. My name is Gabriel, I am a master certified automotive technician and I would be happy to assist you with this today.

 

It sounds like the sunroof motor may have lost it's saved positioning, or maybe something is stuck and binding in the tracks. Has the battery been disconnected at all recently?

Customer: replied 16 days ago.
No
Customer: replied 16 days ago.
Nothing seems stuck
Customer: replied 16 days ago.
Will open fully but when we go close it only goes back to vent position and will not go to the next step of lowering
Expert:  Gabriel Grey replied 16 days ago.

Okay got it.

 

These have saved positions in the motor, and when it loses these saved positions then it will not allow it to fully close, because the computer thinks that it is already closed.

 

I am trying to locate the service procedure to see if this can be done using the switch or if it will need a scan tool to relearn the motor

Customer: replied 16 days ago.
Ta
Customer: replied 16 days ago.
Yes I’m sure that is the case
Expert:  Gabriel Grey replied 16 days ago.

Yeah that is the most common cause when this happens

Customer: replied 16 days ago.
How do we reset is there a fuse
Expert:  Gabriel Grey replied 16 days ago.

Here are the instructions I found from MB

  1. Close all your car’s doors.
  2. Put the key to position II.
  3. Don’t start the car.
  4. Open the sunroof all the way. It may require that you press the sunroof open switch several times.
  5. Once you reach the fully open position, continue to HOLD the sunroof switch in the OPEN position until hear a click. If you don’t hear the click make sure to hold the switch for up to 5 seconds.
  6. Next, close the sunroof and again hold the switch for 5 seconds when you reach the closed position
  7. Check if the problem has been fixed. If not, repeat steps 4 through 6.

You may also try these steps:

  1. With your key in position 1 or 2 and all doors closed, press the sunroof button to the tilt position and hold it for 5 seconds.
  2. Push the button towards the rear seats and hold it for 5 seconds.
  3. Push the button forward and hold again for 5 seconds.
  4. Push it toward the bottom and hold it for 5 seconds.
  5. Check if the sunroof is working properly again. Repeat steps 1-4 as needed.
Customer: replied 16 days ago.
No still same
Expert:  Gabriel Grey replied 16 days ago.

Alright, if the reset is not working then there is most likely an internal issue in the motor/module

Customer: replied 16 days ago.
Ok need go to auto mechanic or Mercedes we are an hour away from Mercedes
Expert:  Gabriel Grey replied 16 days ago.

Yes it will need to go to a certified repair shop to test/inspect module operation

Customer: replied 16 days ago.
Any thing else what about disconnecting battery
Expert:  Gabriel Grey replied 16 days ago.

It would be worth a shot to disconnect the battery for about 10mins to see if the system will reset

Customer: replied 16 days ago.
Thank you
Expert:  Gabriel Grey replied 16 days ago.

You are very welcome

Customer: replied 16 days ago.
How do I disconnect
Expert:  Gabriel Grey replied 16 days ago.

I will close this out now and the chat will be finished. Have a great night, feel free to reach out for any future needed assistance